Vulnerability Description
Appwrite before 2.0.0 contains an argument injection vulnerability that allows authenticated users with functions.write or sites.write permissions to execute arbitrary commands by injecting TAB characters into the providerRootDirectory parameter used to construct GNU tar commands. The application uses escapeshellcmd instead of escapeshellarg and fails to quote the parameter, allowing TAB characters to survive sanitization and be interpreted as argument separators, enabling injection of arbitrary GNU tar arguments such as --checkpoint-action=exec to achieve remote code execution as the builds worker process user.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/appwrite/appwrite/commit/a82dc6e386a6ac7b88e853a1e6fdb59e0b79
- https://github.com/appwrite/appwrite/pull/13028
- https://github.com/appwrite/appwrite/releases#release-2.0.0
- https://www.vulncheck.com/advisories/appwrite-argument-injection-via-providerroo
FAQ
What is CVE-2026-89036?
CVE-2026-89036 is a vulnerability with a CVSS score of 8.8 (HIGH). Appwrite before 2.0.0 contains an argument injection vulnerability that allows authenticated users with functions.write or sites.write permissions to execute arbitrary commands by injecting TAB charac...
How severe is CVE-2026-89036?
CVE-2026-89036 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-89036?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.